Lumbar Plexus Flashcards
What forms the Lumbar plexus
Anterior primary rami of L1-L3 and part of L4. Some contribution from T12 via communication with L1
What n. travels ant. and inf. between the QL and kidney through the transverse abdominal m. giving off a lateral cutaneous branch
Iliohypogastric
What does the lateral cutaneous branch supply
The posterolateral gluteal region
What branch of the iliohypogastric n. supplies the skin of the pubic region
Anterior Cutaneous branch
What 2 m. does the iliohypogastric n. supply
Internal oblique
Transversus abdominus
What n. follows a similar path to the iliohypogastric n. and travels with the spermatic cord (males) or round lig. (females)
Ilioinguinal
What 2 m. does the ilioinguinal n. supply
Internal oblique
Transversus abdominus
What m. does the genitofemoral n. pass through before it divides
Psoas major
What n. gives motor supply to the cremaster and sensory to the skin of the sup. ant. scrotum
Genital branch of genitofemoral
What n. supplies the skin of the mons pubis and labium majus
Genital branch of genitofemoral
What n. supplies the skin of the upper anterior thigh
Femoral branch of genitofemoral
Where are the only 2 places the femoral n. gives off branches
Abdomen and femoral triangle
What do the branches from the abdominal part of the femoral n. supply
Iliacus and pectineus
What happens to the femoral n. once it is beyond the inguinal ligament
Divides into ant. and post. divisions
What are the 3 nerves of the anterior division of the femoral n.
Intermediate and medial cutaneous nerves of the thigh and Nerve to sartorius
What n. does the intermediate cutaneous n. of the thigh communicate with
Femoral branch of the genitofemoral n.
What n. does the medial cutaneous n. of the thigh communicate with
Saphenous n.
What does the posterior division of the femoral n. give rise to
Muscular branches to quads
Vascular branches to femoral artery
Articular branches to knee
What does the posterior division continue into the leg as
Saphenous n.
What is the saphenous n. transmitted through
Adductor canal (travels with great saphenous vein in leg)
What happens to the patellar reflex if the femoral n. is compromised
Decreased. (sensory deficits also may occur)
What separates the ant. and post. branches of the obturator n.
Initially the obturator externus, then by adductor brevis
What do the ant. branches of the obturator n. that communicate with branches of the femoral n. form
Subsartorial plexus
The anterior branch of the obturator n. supplies what artery
Femoral
